Adjustable bridge for bifocal lenses



y 1938. A. o. YOE

ADJUSTABLE BRIDGE FOR BIF'OCAL LENSES Original Filed Feb. 1, 1935 2Sheets-Sheet 1' May 17, 1938. A. O. YOE

ADJUSTABLE BRIDGE FOR BIFOCAL LENSES Original Filed Feb. 1, 1935 2Sheets-Sheet 2 3114A" n10 42% am 0 Ike,

wa if Zi t f/ Reissued May 17, 1938 UNITED STATES PATENT OFFICEADJUSTABLE BRIDGE FOR BIFOCAL LENSES Alphas 0. Yea,

'lailadeg Ala George P. Kimmei, Brookeviiie, Ind.

a. "dumb 18 Claims.

This invention relates to spectacles or eyeglasses, and particularly toan adjustable nose bridge for use with bifocal lenses.

Bifocal lenses such as are used in spectacles and eyeglasses wereoriginally made by cementing into the lower portion of the rims a lenshaving a different focal length from the upper portion. More recently ithas become the general practice to form both lenses from a. single pieceof optical 1 glass and to grind the lower portion thereof so that it hasa diflerent focal length from the upper portion of the lens. Such lensespresent a more sightly appearance, as the line where the separate lensesof different loci were cemented together is eliminated.

Bifocal lenses as now commonly made have the lens of shortest focus,generally termed the reading lens, at the bottom, and the lens 0!longest focus, or the distance lens, at the top. As the distance lens isthe one normally used and the reading lens is used only when one isreading, it is the usual practice to make the distance lens of a largerarea than the reading lens and when the glasses are worn it liesopposite the lens of the 2.1 eye and imparts no additional strain on theeye due to its position with respect to the lens of the eye. However,the reading lens lies below the level of the lens of the eye, whichnecessitates that the wearer, when reading, look downward, so

that the angle of vision is not normal and additional strain is placedupon the eye.

It has heretofore been proposed to overcome the above objection to theuse of bifocal lenses by providing a nose bridge which might be shifted:is in either of two positions, so as to bring either the reading lensor the distance lens opposite the lens of the eye of the wearer, so thatno additional strain is placed upon the eyes, regardless of which lensis being used. Such proposals, while satisfactory from the standpoint ofeliminating additional eye strain due to an abnormal angle of visionhave been objectionable in that it has been necessary to remove theeyeglasses or spectacles from the face in order to adjust the bridge tobring the other lens opposite the lens of the eye.

With the above and other considerations in mind, it is proposd by thepresent invention to provide an adjustable nose bridge for use withbifocal lenses which may be adjusted readily to bring either lensopposite the lens of the eye, without removing the eyeglasses orspectacles from the face, and which will be of relatively simplestructure and present a sightly appearance. More particularly, thepresent invention comprises a bridge piece carrying the usual nose padsat its lower end and a member which is secured rigidly to and connectsthe inner edges of the lenses and is slidably mounted with respect tothe member carrying the nose pads. The two members bear against eachother. or an interposed 5 spring member, with sufilcient force to causethem to be retained frictionally in either of their adiusted positions.However, the members may be shifted relative to each other merely byovercoming the friction between the respective parts.

In order that the lenses may be shifted upwardly or downwardly while thespectacles or eyeglasses are on the face of the wearer, the memberrigidly attached to the lenses preferably comprises a pair of spaced,horizontally-extending bars, or one bar and a projection extendinghorizontally from one or both sides of said member, and the member whichcarries the nose pads has a horizontally-extending bar located betweenthe spaced bars of the slidable member. With such 20 an arrangement, toshift the relative position of the lenses it is only necessary that thecross bar of the pad-carrying member and one of the cross bars of themember which carries the lenses be engaged with the thumb and indexfinger and suihcient force exerted on them to overcome the slidingfriction between the parts to cause the cross bar of the lens-carryingmember which has been gripped to move towards the cross bar oi thenose-pad-carrying member. If the lenses are in the normal position withthe distance lenses opposite the lenses of the eye, and it is desired toshift them to bring the reading lenses opposite the lenses oi,the eye,the lower cross bar of the lens-carrying member is engaged with thethumb'and the cross bar of the pad-carrying member is engaged with theindex finger. When the parts are then pinched together the lens-carryingmember slides upwardly on the pad-carrying member and the lenses areraised to a position where the reading lens lies opposite the eye. If itis,subsequently desired to shift the lenses back for distance vision thecross bar of the pad carrying member is engaged with the thumb and theupper bar of the lens-carrying member engaged with the index finger.when the parts are then pinched together the lens-carrying member slidesdownwardly on the pad-carrying member and the distance lenses are againbrought opposite the lenses of the eye.

The invention will be further described in connection with theaccompanying drawings, but it is to be understood that such furtherdisclosure is by way of an exemplification and that the invention is notlimited thereby, and is only limited to the extent set forth in thesubiolned claims.

In the drawings:

Figure l is an elevational view of a pair of spectacles embodying theinvention, being viewed from the side through which the wearer looks andshowing the bridge adjusted to the position so that the lower lens willbe opposite the lens of the eye,

Figure 2 is a similar view to Figure 1 with the bridge adjusted so thatthe upper lens is brought opposite the lens of the eye,

Figure 3 is a plan view of Figures 1 and 2,

figure 4 is a horizontal cross sectional view taken on line |4, Figure1,

Figure 5 is a detail cross sectional view taken on line 5-5, Figure 2,

Figure 6 is a vertical sectional view through the adjustable bridge,

Figure '7 Is a perspective view of that portion of the bridge to whichthe lenses are secured,

Figure 8 is an elevational view partly in section of a modified form ofadjustable bridge,

Figure 9 is a cross sectional view taken on line 89, Figure 8,

Figure 10 is an elevational view partly in section of another modifiedform of adjustable bridge, and

Figure 11 is a cross sectional view taken on line II-I I, Figure 10.

Referring to the drawings, and first to the embodiment of the inventionshown in Figures 1 to 7, the adjustable bridge is shown as applied tospectacles having bifocal lenses having upper and lower lens portions Iand 2 which are ground to have different foci. As is usual in bifocallenses, the upper lenses I normally lie opposite the lenses of the eyeand are ground to have a longer focal length than the lower lenses 2 andare adapted for distant vision. The lenses 2 are ground to have ashorter focal length and are the normal reading lenses. Temple bars 3are secured to the outer edges of the lenses by means of the usual lensstraps 4.

The adjustable bridge comprises two relatively slidable parts 5 and 5.The part 5 comprises a pair of vertically extending bars I which carryadjacent their lower ends lens straps l for securing the bridge part 5rigidly to the respective lenses. The vertically extending bars 1 areconnected together by a pair of vertically spaced. horizontallyextending cross bars 9 and I0, one of which preferably connects theupper ends of the vertical bars I and the other of which extends betweensaid bars in the region of the lens straps I. In order that the bridgemember 5 may generally conform to the contour of the wearer's face whenthe spectacles are being worn, the upwardly extending bars I arepreferably curved longitudinally outwardly so that they will lie closeto that portion of the face where the upper part of the nose joins thelower portion of the forehead, and the horizontally extending cross bars9 and ID are curved outwardly to better fit around the bridge of thenose.

The bridge part 6 preferably comprises an inverted U-shaped memberhaving vertically extending legs II and a cross bar I2 connecting theirupper ends and curved outwardly in the same manner as the cross bars 9and Id of the member 5 to generally conform to the shape of the wearer'snose. Bridge pads I3, adapted to bear against opposite sides of the noseand to support the spectacles upon the face, are carried by therespective legs II of the U-shaped mem-' her I.

In order that the bridge members 5 and 5' may readily slide relative toone another. the inner sides of the vertically extending bars I and theouter sides of the legs ll of the U-shaped member are provided withcomplementary frictlonally engaging track portions. The particular shapeof the complementary track portions of the bars I and legs II may takevarious forms. In this particular embodiment of the invention, each isof general V-shape and arranged in partially overlapping relation asshown in Figure 5, and with the U-shaped member Ii extending slightlyinwardly from the vertically extending bars I of the member 5. The outersides of legs II of the member 8 bear against the inner sides of thevertically extending bars of the member 5 with sumcient force tonormally cause the members 5 and 6 to be held in any relative position;yet they may he slid relative to one another merely by overcoming thefriction between them. There are no latches or catches which must bedisengaged before they may be shifted to a different position ofadjustment.

The cross bar I2 of the U-shaped member li lies between the verticallyspaced cross bars 5 and Id of the member 5 and has a finger piece Itextending forwardly a distance sufficient to lie in a plane passingthrough said bars.

In Figure 2 the spectacles are shown with the parts 5 and B shifted sothat the upper or distance lenses I would lie opposite the lenses of theeyes when the spectacles are placed upon the face. If it should bedesired to shift the spectacles to the position shown in Figure 1 inwhich the lower or reading lenses 2 would be positioned opposite thelenses of the eyes, it would only be necessary that the thumb be placedbeneath the cross bar Ill and the index finger placed above the crossbar I! and/or its protruding finger piece I4 and the parts then pinchedtowards each other. When that Is done the member 5 will slide upwardlyon the legs II of the member 5 and the parts will be shifted to thedesired position of adjustment with the reading lenses opposite thelenses of the eyes, and the wearer may use the spectacles for readingpurposes without subjecting the eyes to additional strain caused by anabnormal angle of vision.

If it should subsequently be desired to again shift the relativepositions of the lenses I and 1 so that the distance lenses I wouldagain lie opposite the lenses of the eyes, it would only be necessarythat the thumb be placed beneath the cross bar I2 and/or its protrudingfinger piece I4, and the index finger placed above the cross bar 8. andthe parts pinched towards each other. The member 5 will then be causedto slide downwardly on the legs II of the member 5 and the bridgemembers again brought into the position shown in Figure 2.

It will be noted that in adjusting the relative positions of the members5 and 6 to bring either the distance or the reading lenses opposite thelenses of the eyes, it is not necessary that the spectacles be removedfrom the face and due to the frictional engagement of the legs II of theU-shaped member 8 with the vertical bars I of the member 5 the memberswill be maintained in either of their positions of adjustment.

In Figures 8 and 9 a modified form of the invention is shown in whichthe bridge member I5 has a pair of vertically extending bars I8 and apair of vertically spaced, horizontally extending,

sons:

connecting cross-bars II and it. Track members II in the form ofresilient springs are attached to the bars I! of the member II in suchmanner that they have at least one free end. While, as shown in Figure8, the spring track members II are brazed or otherwise secured at theirupper ends to the inner sides of the bars II, the spring track membersmay. if desired, be secured at a mid-point and have both their upper andlower ends free. The spring tracks I may have any desired crosssectional shape, but are preferably circular in cross section as isshown in Figure 9.

The nose-pad carrying member 20, like the corresponding member in theembodiment shown in Figures 1 to 7, comprises a pair of verticallyextending bars 2| having track sections at their outer sidescomplementary to the spring track members I, and a cross bar 22connecting the vertically extending bars 2| and positioned between thecross-bars l1 and I. of the bridge member l5, and provided with a fingerprotruding piece M.

The free ends of the spring track members I! are sprung inwardly so thatthey bear against the complementary track portions of the bars 2i withsufllcient friction to retain the members l5 and 20 in any relativeposition of adjustment.

The manner of shifting the members it and 20 relative to one another toposition either the distance or reading lenses opposite the lenses ofthe eye is the same as has been described above in connection with thefirst embodiment of the invention.

In Figures and 11 a still further modification of the invention isshown, and in those figures the bridge member 22 has verticallyextending bars or side parts 24 having grooves lengthwise of their innersides, and vertically spaced, horizontally extending connectingcross-bars 25 and 26. The nose-pad carrying member 21 is generallysimilar in contour to the member 6 disclosed in Figures 1 to 7, andcomprises vertically extending bars or side portions 28 and thehorizontal bar 29 connecting the outer ends of the bars 28. As is moreclearly shown in Figure 11, the track formed on the inner sides of thevertically extending bars 2! is V-shaped, and the bars 28 have theirouter sides correspondingly vshaped to fit within the track of the bars24.

The inner sides of the vertical bars 28 of the member 21 are grooved toreceive a reinforcing spring member 80, which normally urges the bars 2!into frictional engagement with the track portions of the bars 24, withsufllcient friction to normally maintain the members 23 and 21 in anyposition to which they may be shifted.

The members 23, 21, and 30 may be termed respectively the outer,intermediate and inner sections of a combined supporting and adjustingstructure for bi-i'ocal glasses and the like. The outer section iscapable of being adjusted relative to the inner section and carries thelenses, the intermediate section is stationary and carries the nose padarms and the inner section provides the resilient contacting member.

The invention has been particularly described in connection withspectacles, but it is to be understood that it might apply equally aswell to eyeglasses, which do not have temple bars for retaining theglasses upon the face of the wearer.

In this specification and in the appended claims the term "nose-pads" isused in a broad sense to define those parts of the eyeglasses orspectacles, regardless of their particular structure, which rest uponthe nose and support the eyeglasses or spectacles. I claim:

1. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,and a second bridge member connected to the respective lenses andslidable vertically with respect to said pad-carrying member to an upperand a lower position, said second member comprising a pair 01'vertically extending parts, a cross-bar connecting said verticallyextending parts and a part vertically spaced from said cross-bar andextending from one vertically extending part towards the othervertically extending part, said pad-carrying member having a cross-barconnecting the pad-carrying parts and positioned between the cross-barand the vertically spaced part of the second member, whereby thecross-bar of the pad-carrying member and either the cross-bar or thevertically spaced part of the second member may be pinched towards eachother to shift the second member into either of its positions ofadjustment.

2. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,and a second bridge member connected to the respective lenses andslidable vertically with respect to said pad-carrying member to an upperand a lower position, said second member comprising a pair of verticallyextending parts, a cross-bar connecting said vertically extending partsand a part vertically spaced from said cross-bar and extending from onevertically extending part towards the other vertically extending part,said pad-carrying member having a cross-bar connecting the pad-carryingparts and positioned between the cross-bar and the vertically spacedpart of the second member, said members bearing frictionally againsteach other with suiiicient force to hold the members in either positionof adjustment, and said members being slidable with respect to oneanother merely by overcoming the friction between them.

3. In eyeglasses or spectacles having bifocal lenses, a generallyU-shaped bridge member having pad portions adapted to bear againstopposite sides of the nose and to support the eyeglasses or spectaclesupon the face of the wearer, and a second bridge member connected to therespective lenses and slidable vertically with respect to said U-shapedmember to an upper and a lower position, said second member having apair of horizontally spaced, vertically extending bars and a pair ofvertically spaced, horizontally extending cross-bars, the cross-bar ofthe U-shaped member being positioned between the horizontally extendingbars of the second member, whereby the cross-bar of the U-shaped memberand either cross-bar of the second member may be pinched towards eachother to shift the second member into either of its positions ofadjustment.

4. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearerand comprising a pair of vertically extending bars and a connectingcross-bar, a second bridge member connected to the respective lenses andslidable vertically with respect to said pad-carrying member to 15 anupper and a lower position, said second member comprising a pair ofhorizontally spaced. vertically extending bars and a pair of verticallyspaced, horizontally extending bars, the outer sides of the verticallyextending bars of the padcarrying member and the inner sides of thevertically extending bars of the second member having complementarytrack portions and the track portions of the two members bearingfrictionally against each other with suflicient force to hold themembers in either of their positions of adiustment, said members beingslidable with respect to one another merely by overcoming the frictionbetween them.

5. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles on the face oi the wearer, asecond bridge member connected to the respective lenses, one of saidmembers having a pair of vertically extending spring track portionscarried thereby and spaced therefrom and the other member havingportions frictionally engaging said spring track portions, whereby thesecond member may slide vertically with respect to said pad-carryingmember to an upper and a lower position.

6. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles on the face of the wearer, asecond bridge member connected to the respective lenses, said secondmember having a pair of vertically extending spring track portionscarried thereby and spaced therefrom and a pad-carrying member havingportions frlctionaliy engaging said spring track portions, whereby thesecond member may slide vertically with respect to said pad-carryingmember to an upper and a lower position.

'7. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles on the face of the wearer, asecond bridge member connected to the respective lenses, said secondmember having a pair of vertically extending spring track portionscarried thereby and spaced therefrom, said spring track portions havingat least one free end. and the pad-carrying member having portionsfrictionally engaging said spring track portions, whereby the secondmember may slide vertically with respect to said pad-carrying member toan upper and a lower position.

8. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,a second bridge member connected to the respective lenses and comprisinga pair of vertically extending barsja cross-bar connecting saidvertically extending bars and a part vertically spaced from saidcross-bar and extending from one vertically extending bar towards theother vertically extending bar, and spring track members carried by thevertically extending bars of the second member, said padcarrying memberhaving track portions frictionally engaging the spring track portions ofthe second member and also having a cross-bar connecting thepad-carrying portions positioned between the cross-bar and thevertically spaced part of the second member whereby the cross-bar of thepad-carrying member and either the cross-bar or the vertically spacedpart of the second memsons:

ber may be pinched towards each other to cause the spring tracks of thesecond member to slide with respect to the track portions of thepad-carrying member to shift the second member either to an upper or alower position.

9. In eyeglasses or spectacles having bifocal lenses, 2. bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,a second bridge member connected to the respective lenses and comprisinga pair of vertically extending bars and a pair of vertically spaced,horizontally extending crossbars connecting said vertically extendingbars, spring track members secured to each of the vertically extendingbars of said second member, the pad-carrying member having portionsfrictionally engaging the spring track of said second member and alsohaving a cross-bar connecting the pad-carrying parts positioned betweenthe crossbars of said second member whereby the cross- I bar of thepad-carrying member and either crossbar of the second member may bepinched towards each other to cause the spring tracks of the secondmember to slide with respect to the pad-carrying member to shift thesecond member either into an upper or a lower position.

10. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the lace oi the wearer,a second bridge member having vertically extending bars to which thelenses are secured, said second member also having a cross-barconnecting said vertically extending bars and a part vertically spacedfrom said cross-bar and extending from at least one vertical bar towardsthe other vertical bar, the padcarrying portion having verticallyextending bars frictionally engaging the vertically extending bars ofsaid second member and also having a connecting cross-bar positionedbetween the cross-bar and the vertically spaced part of the secondmember, whereby the cross-bar of the pad-carrying member and either thecross-bar or the vertically spaced part of the second member may bepinched towards each other to shift the second member either upwardly ordownwardly with respect to the pad-carrying member. and a resilientreinforcing member for holding the vertically extending bars of thepad-carrying member in frictional engagement with the verticallyextending bars of the second member with sufllcient force to cause thesecond member to be retained in any position of adjustment with respectto the pad-carrying member.

11, In eyeglasses or spectacles having bifocal lenses, a bridge membercomprising a pair of vertically extending parts and a connecting crossbar, pad portions carried by the vertically extending parts adapted tobear against opposite sides of the nose and to support the eyeglasses orspectacles upon the face of the wearer, a second bridge member connectedto the respective lenses and slidable vertically with respect to saidfirstmentioned bridge member to an upper and a lower position, saidsecond bridge member comprising a pair oi vertically extending partsfrictionally bearing against the vertically extending parts of the firstmentioned bridge member, a cross-bar connecting said verticallyextending parts and a part vertically spaced from said cross-bar andextending from one vertically extending part towards the othervertically extending part, the cross-bar of said first-mentioned bridgemember being positioned between the cross-bar and the vertically spacedpart of the second member, whereby the crossbar of the first-mentionedbridge member and either the cross-bar or the vertically spaced part ofthe second bridge member may be pinched towards each other to shift thesecond bridge member into either of its positions of adjustment, and aU-shaped resilient reinforcing member having the legs thereof bearingagainst the inner sides of the vertically extending parts of the firstbridge member for holding said parts in frictional engagement with thevertically extending parts of the second bridge member with sufflcientforce to hold the members in either position of adjustment.

12. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,a second bridge member connected to the respective lenses and slidablevertically with respect to said pad-carrying member to an upper and alower position, said second member comprising a pair of verticallyextending parts, a cross-bar connecting said vertically extending partsand a part vertically spaced from said cross-bar and extending from onevertically extending part towards the other vertically extending part,said pad-carrying member having a cross-bar connecting the padcarryingparts and positioned between the crossbar and the vertically spaced partof the second member, whereby the cross-bar of the pad-carrying memberand either the crossbar or the vertically spaced part of the secondmember may be pinched towards each other to shift the second member intoeither of its positions of adjustment, the vertically extending parts ofthe first bridge member being grooved on their inner edges, and aresilient reinforcing member having parts thereof positioned in saidgrooves for holding the vertically extending parts of said bridge memberin frictional engagement with the vertically extending parts of thesecond bridge member with sufficient force to hold the bridge members ineither position of adjustment.

13. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,and a second bridge member connected to the respective lenses andmovable with respect to said pad-carrying member to an upper and lowerposition, the said bridge members being so related as to provide forfrictionally retaining the second bridge member in selected positions ofadjustment, the said bridge members including upper horizontallydisposed bridging portions each having an outwardly directed curvatureand arranged in offset relation, the bridging portion of the first namedmember being formed with an outwardly directed part to provide a fingerengaging portion to facilitate shifting the lenses into upper or lowerpositions, while the eyeglasses or spectacles are being worn.

14. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,and a second bridge member connected to the respective lenses andslidabie vertically with respect to said pad-carrying member to an upperand lower position, said second member comprising a pair of verticallyextending parts, a cross-bar connecting said vertically extending partsand a part vertically spaced from said cross-bar and extending from onevertically extending part towards the other vertically extending part,said pad-carrying member having a cross-bar connecting the pad-carryingparts and positioned between the cross-bar and the vertically spacedpart of the second member, said pad-carrying cross-bar being formed toprovide a finger engaging portion, whereby the cross-bar of thepad-carrying member and either the crossbar or the vertically spacedpart of the second member may be pinched towards each other to shift thesecond member into either of its positions of adjustment.

15. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,and a second bridge member connected to the respective lenses andslidable vertically with respect to said pad-carrying member to an upperand lower position, said second member comprising a pair of verticallyextending parts, a cross-bar connecting said vertically extending partsand a part vertically spaced from said cross-bar and extending from onevertically extending part towards the other vertically extending part,said pad-carrying member having a cross-bar connecting the pad-carryingparts and positioned between the cross-bar and the vertically spacedpart of the second member, said pad-carrying cross-bar being formed toprovide a projecting finger engaging piece, whereby the cross-bar of thepad-carrying member and either the cross-bar or the vertically spacedpart of the second member may be pinched towards each other to shift thesecond member into either of its positions of adjustment.

16. In eyeglasses or spectacles having bifocal lenses, a bridge memberhaving pad portions adapted to bear against opposite sides of the noseand to support the eyeglasses or spectacles upon the face of the wearer,and a second bridge member connected to the respective lenses andmovable with respect to said pad-carrying member to an upper and lowerposition, the said bridge members being so related as to provide forfrictionally retaining the second bridge member in selected position ofadjustment, the said bridge members including superposed horizontallydisposed outwardly projected arcuate-shaped bridging portions forengagement by the fingers of a wearer of the eyeglasses or spectacles,the first mentioned member having its bridging portion formedapproximately centrally of its front with an outwardly directed part toprovide a finger engageable portion to facilitate shifting the saidsecond member into upper or lower positions of adjustment while thespectacles or eyeglasses are being worn.

1'7. In a combined supporting and adjusting structure for bi-focalglasses and the like, said structure being formed respectively of avertically adjustable outer section including side parts for carryingthe lenses, said parts being grooved on their inner sides to providetracks; a stationary intermediate section arranged within the outersection and including side portions positioned in said tracks carryingnose pad arms, the said side portions being grooved on their innerfaces; and a contractible and expandible inner section arranged withinthe intermediate section including side parts bearing in the grooves ofthe said side portions for maintaining these latter in frictionalslidable engagement with said tracks to releasably hold said outersection in adjusted relation to the intermediate section.

18. In a combined supporting and adjusting structure for bi-iocalglasses and the like including a vertically movable shiitable sectionformed with side parts for carrying the lenses. said aide parts beingprovided at their inner sides with grooves to constitute tracks. astationary section formed with side portions positioned in said tracksand carrying nose-pad arms. and spring means arranged within andcoacting with the side portlons of the stationary section formaintaining them in frictional slidable engagement with said tracks toretain the adjustable section in adjusted position.

ALI-HUS O. YOE.

CERTIFICATE OF CORRECTION.

Reissue No. 20,752. May 17, 1958 ALPHUS o. YOE.

It is hereby certified that error appears in the above numbered patentrequiring correction as follows: In the grant, line 2, and in theheading to the printed specification, line b residence of assignee, for"Brookeville Indiana" read Brookeville, Maryland; and. that the saidLetters Patent should be read with this correction therein that the samemay conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of June, A. D. 1958.

Henry Van Aredale,

(Seal) Acting Commissioner. of Patents.

